+91 1204460697 +91 89295 05072 
info@soltex.in
+91 1204460697 +91 89295 05072 info@soltex.in
Technical Textiles
Technical textiles are textile-based materials engineered primarily for performance rather than appearance. Instead of being chosen for look and feel, they are selected for measurable functional properties — high strength, heat resistance, chemical resistance, filtration efficiency, protection, thermal insulation, structural reinforcement, and long-term durability under demanding conditions.
Through Soltex, businesses and institutions gain access to specialized technical materials developed for exactly this kind of performance-critical use — from structural reinforcement in advanced composites to thermal protection in high-temperature environments and lightweight functional fillers for engineered composite systems
INTRODUCTION
Soltex provides access to specialized technical materials for demanding industrial and engineering applications, sourced through our Russian Advanced Materials Technology Partner — a research and production organization with a long-standing focus on glass-fiber and composite material technology.
Our advanced materials portfolio spans three categories:
- A. High-Modulus High-Strength Glass Fibers — advanced reinforcement fibers for high-performance composite structures
- B. High-Temperature Resistant Silica & Quartz Fibers — fibers engineered for extreme-temperature and protective applications
- C. Hollow Glass Microspheres — lightweight functional fillers for syntactic and sandwich composite systems
Each category is described below, along with what you will find in the corresponding technical documentation.
HIGH-MODULUS HIGH-STRENGTH GLASS FIBERS
High-modulus high-strength glass fibers (referred to in the technical documentation by the designation BMI) are reinforcement fibers developed for advanced composite constructions. Their performance advantage over conventional E-glass or borosilicate glass fibers comes from their optimized chemical composition.
To Know More about the technical specifications for this product
Key Technical Characteristics
Typical properties of BMI fibers, as documented:
| Property | Value |
| Density | 2.68 g/cm³ |
| Tensile Strength | 2800–3500 MPa |
| Tensile Modulus | 140–160 GPa |
| Elongation at Break | 1.8–2.2% |
| Filament Diameter | 8–15 µm |
| Operating Temperature | −200 to +700°C |
| Moisture Content | < 0.10% |
| Sizing Content | 0.8–1.2% |
For context, the documentation also presents a comparison against conventional E-glass fiber — showing higher tensile modulus (140 GPa vs 72 GPa), a wider operating temperature range (up to +700°C vs up to +450°C), lower water absorption (0.2% vs 0.3%), and a tighter filament diameter distribution (±15% vs ±20%).
Technical Performance
The combination of high tensile strength and high tensile modulus allows BMI-based composites to carry greater structural loads at lower weight than composites reinforced with conventional glass fibers, while also withstanding a substantially wider operating temperature range. This combination of mechanical performance and thermal stability is what makes the fiber relevant to advanced, weight-sensitive composite structures.
Product Forms
The technical documentation covers the following product forms:
- Fibres / filaments
- Twisted yarns
- Rovings
- Glass fabrics (twisted-yarn and combined weave constructions)
Applications
Based on the supplied documentation, BMN/BMI-fibre-reinforced composites are used in:
- Aerospace
- Automotive
- Shipbuilding
- High-pressure vessels, bottles and pipes
- Ballistic-protective composite materials
- Heavy-loaded building structures
- Wind-power plant structural elements
- Sports and recreation equipment
HIGH-TEMPERATURE RESISTANT SILICA & QUARTZ FIBERS
Silica and quartz fiber materials were originally developed to protect spacecraft from exposure to extreme heat. Our Russian Advanced Materials Technology Partner has been active in this field for more than 50 years, and today produces a wide range of quartz- and silica-fiber-based materials for both aerospace and industrial use.
Material Characteristics
Quartz fibers are produced by fiber-drawing from pure quartz glass with a SiO₂ content exceeding 99.95%. This gives quartz fiber a distinct combination of very high elastic and strength characteristics along with high thermal and chemical resistance — a higher level of performance than silica fiber.
| Quartz Fiber Property | Value |
| SiO₂ content | ≥ 99.95% |
| Continuous fiber diameter | 10–11 µm |
| Discrete fiber diameter | 1–2 µm / 5–6 µm |
| Tensile strength (untouched) | 6.0 GPa |
| Tensile strength (from a bobbin) | 3.6 GPa |
| Melting temperature | ≈ 2,000°C |
| Long-term operating temperature | up to 1,250°C |
| Short-term operating temperature | up to 2,000°C |
Silica fibers are produced by chemically leaching glass fibers in an acid solution, which considerably increases the SiO₂ content of the fiber (documented at 94–95% for the initial glass-to-silica-fiber conversion used by our technology partner, compared with an initial E-glass composition of 52–55% SiO₂). This process reduces alkali oxide content, which gives the fiber its acid resistance. Silica fiber offers a unique combination of exceptionally high temperature resistance (over 1000°C), high elasticity, preserved chemical resistance, and high radiation resistance.
Technical Performance
The high-temperature resistance, chemical stability, and thermal-insulating capability of silica and quartz fibers make them suitable for applications where materials must retain structural and protective performance under sustained or extreme heat exposure—conditions under which conventional textile materials degrade.
Product Forms
The documentation covers the following forms:
- Fabrics
- Yarns
- Meshes
- Sleeves (hollow, and filled with heat-resistant tissue or silica yarn)
- Tapes
- Stitch-bonded / sew-knit sheets
- Rovings
- Chopped and discrete fibres
- Super-thin and ultra-thin fibre variants (1.5–2.0 µm and 0.8–1.0 µm diameter), available on customer request
Applications
Based on the supplied documentation, applications include:
- Space and aerospace thermal protection
- Industrial thermal insulation, including heat insulation for power-generating plants (including nuclear power stations)
- Fire-resistant curtains and protective outer garments for firemen and rescuers
- Metallurgical filtration of ferrous and non-ferrous melts
- Filtration of aggressive solvents and gases
- General high-temperature industrial applications
HOLLOW GLASS MICROSPHERES
Hollow glass microspheres (HGM) are a white, dry powder made up of tiny hollow glass bubbles, originally developed to meet the need for light-weight, strong, water-resistant materials for deep-submergence vehicle research. Their glass composition and near-regular spherical shape give them a distinct combination of mechanical, thermal and chemical properties that make them suitable as a functional filler across a wide range of industries.
Material Fundamentals
According to the technical documentation, hollow glass microspheres are characterised by:
- Particle diameter of approximately 20–160 µm
- Low density
- High compressive strength
- Low water absorption
- Low heat conductivity
- High chemical resistance
- Radio-transparency
- Good adhesion to polymer binders, enabling the formation of syntactic composites
Manufacturing / Technical Principle
HGM manufacturing combines hydrodynamic, physical, and chemical processes in which hollow bubbles are formed from micro-particles of glass melt by blowing. Special fine-dispersion, multi-component glass powders are formulated to form micro-particles of a predetermined volume in the melted state, with an exact dosage of a gas-generating component controlling the wall thickness of the resulting microspheres. Because of the complexity of this process, microspheres cannot be produced to a single, strictly identical diameter — calibration by size is performed where required.
Strength Characteristics
Microsphere strength is defined as the hydrostatic pressure at which no more than 10% of the microspheres fail. As documented, microspheres with greater weight — and therefore thicker walls — withstand higher pressure before failure, with the failure rate increasing progressively with applied pressure across the density range tested.
Composite Technology
Hollow glass microspheres are used to produce syntactic composites — composite systems in which the microspheres are dispersed within a polymer binder. This technology addresses a key challenge in sandwich-composite manufacturing: producing multilayer items with complex geometries, variable thickness, and local reinforcement.
SYNLAY is the documented sheet semi-finished product based on HGM, developed for manufacturing sandwich composites. In appearance, it resembles a rolled, non-tacky sheet material. Key documented characteristics:
- HGM content can theoretically reach up to 70% of the total volume
- The material remains elastic even at this high filler content, due to its specially designed polymer binder formulation
- Sheet thickness ranges from approximately 0.7 to 30 mm
- Shelf life with epoxy resin: up to 3 months at +20°C, or up to two years at −5°C
- Suitable for press molding, vacuum molding, autoclave molding, winding, and blow-molding processes
- Does not require additional glues as a sandwich core, since the polymer binder content is sufficient to bond to the face sheets
- Enables very thin sandwich structures (down to approximately 1 mm) — a thickness not achievable using foam plastics or honeycomb cores
Documented comparative data shows composites based on HGM (SYNLAY) offering higher density, compressive strength, compressive modulus and shear strength than conventional foam-core materials across all measured parameters.
Applications
Based on the supplied documentation, applications include:
- Deep-submergence vessels — for buoyancy elements and for molding high-strength structural components
- Oil & gas/drilling — as an additive to drilling mud to intensify the drilling process and extend equipment life, and in cement mortar to produce a shrinkage-free, heat-insulating, quick-hardening bonding material between casing pipes and the well seam
- Paints, varnishes, sealants and mastics
- Aerospace and automotive
- Shipbuilding and construction
- Other lightweight intermediate-filler applications for sandwich composites across industrial sectors
Grades / Specifications
The technical documentation lists a range of microsphere designations (including the MCBП / MCBПА9 series across multiple grades, and the MCB-1/2/3 series) with associated density, strength, volume ratio, humidity and particle-size-distribution data. Density across the documented grades ranges from approximately 0.18 to 0.41 g/cm³, with strength (at the 10% failure level in water) ranging from 3.0 to 15.0 MPa for the graded series. Microspheres designated MCBПА9 are surface-treated with γ-aminopropyltriethoxysilane to improve adhesion to polymer binders.